Streatham Labour MP Bell Ribeiro-Addy is among those writing to the Chancellor, saying minorities are disproportionately affected by welfare cuts.
The chancellor's under pressure to address rising living costs when he presents his budget later.
Rishi Sunak says he's preparing for a 'new economy post-Covid'.
He's already announced changes that'll lead to pay rises for millions of workers - but national insurance is also going up and families face higher household bills.